285779939491 has 2 divisors, whose sum is σ = 285779939492. Its totient is φ = 285779939490.

The previous prime is 285779939449. The next prime is 285779939527. The reversal of 285779939491 is 194939977582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285779939491 - 2²⁵ = 285746385059 is a prime.

It is not a weakly prime, because it can be changed into another prime (285779939591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142889969745 + 142889969746.

It is an arithmetic number, because the mean of its divisors is an integer number (142889969746).

Almost surely, 2^285779939491 is an apocalyptic number.

285779939491 is a deficient number, since it is larger than the sum of its proper divisors (1).

285779939491 is an equidigital number, since it uses as much as digits as its factorization.

285779939491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308629440, while the sum is 73.

The spelling of 285779939491 in words is "two hundred eighty-five billion, seven hundred seventy-nine million, nine hundred thirty-nine thousand, four hundred ninety-one".